Non-conducting material and process of making same.



STATES PATENT, OFFICE- f I THOMAS 1B. PARKISON, 0F MUNOIE, INDIlLANA, ASSIGNOR T0 UNION FIBRE COMPANY,

OF WINONA, MINNESOTA, A CORPORATION OF MINNESOTA.

NON-CONDUC'IiNGMATERIAL AND rnoonss or MAKING smn.

Specification of Letters .Ifatent.

- Patented Nov. 11,1913'.

No Drawing. Continuation 9f application Serial No. 461,942, filed November 10, .1908. This application flledluly 31,1909. Serial No. 510,670.

To all whom it may concern:

Be it known that I, THOMAS B. PARKI- SON, a citizen of-the United States, residing at Muncie, in the county of Delaware and State of Indiana, have invented a new and useful'Non-Conducting Material and Process of Makin Same, of ,which the following is a speci cation. fi

This invention relates to non-conducting insulating material adapted for lining houses, cold storage chambers, refrigerating cars, or for covering steampipes and the like, for preventing the conduction of sound, heat or cold and to the process of making the'same; and the principal object of; the invention is the production of an improved lith' which is an insulating material composed of mineral wool and a suitable hinder,

or mineral wool and degummed flax fiber,

compounded according to the methods set forth in the United States patents granted to George. Kelly, No. 665,229 of-Jan. 1st,

1901, and No. 811,227, of January 30, 1906, the present invention residing in the manufacture of an insulating material possessing all thedesirable qualities of the commercial lith, while having Ithe'further property 'of resi'sting moisture and, in some instances, 1

resisting fire.

In carrying out the invention, mineral wool constitutes the chief ingredient because of? its superior insulatingjqualities, and thls is preferably treated after the process dlsclosed in my Patent Number 945, 583, dated January 4,- 1910, by which the Individual filaments or fibers of the mineral wool are coated with a volatile oil-during the process of forming the fibers from the molten slag, by directing etroleum into the blast that produces the lamentary form, with the resuit that. the petroleum is converted into; smoke, which penetrates the mass of moving? fibers and coats them with thehydrocarbon, sothat the coating aids, to a great extent, inwaterproofing the material The mineral wool, thus prepared, is in the simplest form? of the material, mixed with a suitable. binder, such as paper stock, or any glutinous. substance which Wlll not impair the insulate; ing qualities of the product. 7111 other;

forms of the' material, the mineral woolz'is mixed with either flax fiber or asbestos fiber, depending wholly upon the character of the product desired. A waterproofing liquid is employed, consisting of either bitumen or asphaltum heated until liquefied and mixed with a relatively crude carbonaceous oil, such as petroleum. The materials made use of are co-mmingled with the said liquid, and thereafter the product is molded or shaped in the form of slabs, tiles or boards, and then dried. 'The waterproofing liquid readily combines with the coating on the mineral wool, so that the resulting product will have a great repelling power to moisture and yet, at the same time, the insulating qualitieslwell known to exist in,

commercial lith are retained. The binder whereby the fibers of the mineral wool are held together-as a self-sustaining mass, may beson'i'evegetable or other glue when paper stock is not used. When paper stock is employed the sizing usedin the production of the paper will serve as a binder for the mineral wool, and the paper fiber materially contributes to give a body to the waterproof material. I

When it is desired to produce waterproof boards, slabs and the like, having considerable tensile strength, some fibrous material is added to the composition. Degummed flaxfiber is. commonly used for this purpose when merely a waterproof lith is desired or, by substituting asbestos for the flax fiber, a fireproof quality is imparted to the'material though the tensile strength is lessened. When asbestosis employed, the binderwill be preferably some vegetable or other glutinous substance and the pa er stock can be dispensed with, andis ma e optional. The

degummed flax fiber will be prepared .under the process described inthe Kelly Patent, No. 665,229; a

To explain mgre in detail the making of this im roved form of lith, the in redients' which may be used are as f0 lows:

Fifty pounds of asphaltum, nine'gallons of ,crude'. petroleum, two hundred pounds of paper; stock or pulp, two hundred and fifty pounds of flax shive or degummed flax fiber, ninahiinfimd unds of mineral wool coated witlilii latile oil, and in addition an indefihitebub-smallquantity of either mineral lith. to thicken the wool or sawdustfrom waterproofing. ,1 llqilllld. compound the asp altum is liquefied by heat In preparing the and the crude' petroleum added theretofor forming thewaterproofing liquid, and to this liquid is supplied for thickening fpurposes mineral Wool, or sawdust made rom cutting blocks of Waterproof lith produced according to the present method, and 5 in such quantity that the resulting waterproofing liquid will have the consistency of apple butter. In the meantime, the paper stock, if such is used, is put into a beater and beaten to a pulp and the flax shive then added .to the beater, and after these two are'thoroughly commingled, the waterproofing liquid as above set forth is added. A few revolutions of the beater are'suflicient 'to mix the waterproofing liquid with the paper pul and shives. Following this, the nine hun red pounds of mineral wool are added and mixed but not beaten in with the mixture already in the beater. After the ingre'dients are thoroughly mixed, the contents of the beater are emptied into the molds and finally. baked.

Of course, when a waterproof and fireproof 7 product is desired, the flax fiber'is dispensed with and asbestos fiber substituted, and in this latter case, some suitable glutinous binder is employed instead of paper pulp. I

The waterproof qualities in the product are obtained from two sources: first, by the.

waterproofing of the mineral wool articles under-the Parkison process, as descri d and claimed in the aforesaid patent; and second by the addition of the waterproofing liquid in the commingling of the various materials. I consider that I am the first to waterproof mineral wool by applying. crude petroleum to the particles or filaments thereof during the process of manufacturing the 10-wool. This wool may be used alone as an insulator, but in ractice is associated with either paper. stocli or other glutinous substance,.or with asbestos or flax fiber. While reliance could. be made upon the initial treatment of the wool as a waterproofing thereof, it is the preferable ractice to employ the waterproofing liqui and I regard Its-1158 88 an important ste in the production of a commercial pro uct. I

This application is'a continuation of my former a plication No. 461,942, filed November 1 1908.

Having thus described the invention, what- I claim as new, anddesire to by Letters-Patent, is

1.v The method ofproducing'a. wit-u warinsulating composition consisting of subjectingimineral wool to the action ofsmoke of. burning petroleum. during the process of manufacturing the wool, and combini with ithe wool so treated a blnder', and a er of greater tensile strength than mineral wool.

.2. Themethod of producingawaterproof insulating composition consisting of subjectture,

ing mineral wool to the action of smoke of burning petroleum during the process of manufacturing the wool, and combining with the wool so treated a binder, and a waterproofing liquid.

3. The method of producing a waterproof insulating composition consisting of subjecting mineral Wool to the action of smoke of burning petroleum during the process of manufacturing the wool, and combining with the wool so treated a binder, a fiber of greater tensile strength than mineral wool, and a waterproofing liquid.

4. The method of producing an insulating composition which consists in coating mineral wool with a hydrocarbon during the process of manufacture by subjecting the troleum, then commingling therewith same to the act-ion of smoke of burnin 'fpe ax treating mineral wool by bringing it into 1 contact with smoke from the combustion of eral wool so treated with a liquid hydrocarbonaceous material, and finally shaping and drying the resulting product.

7 The method of producing a waterproof treating mineral wool by bringing it into petroleum, and then commingling the mininsulating composition, which consists in contact with smoke from the. combustion of petroleum, and then commingling the mineral,.wool so treated with a liquid hydrocarbonaceous material anda fiber of greater tensile strength from the mineral wool.

8. An insulating composition including mineral wool, the individual fibers of whic have been coated duringthe process pf manufacture .with the smoke of burning fiplea waterproo g troleum, combined with liquid.

9. An insulating composition composed of mineral wool, the fibers of which have been subjected to the action of smoke of burning petroleum during the process of manufaccombined' with a waterproofing'liquid, and a flax fiber. 1

10; An insulating composition includin mineral wool the individual'fibers'of whic are coated during the process of m'anufacture with smoke from burning petroleum.

11.'An insulating composition c'ompose'd of .a'binder, amixture of liquid asphaltuin and petroleum, and mineral wool, the fibers of which have been previously coated. with hydrocarbonaceous material, the mass so formed being molded and dried.

12. An insulating composition composed of the following in redients in the .following proportions fty pounds of asphaltum, nine gallons of crude petroleum, two hundred and fifty pounds of flax shives, and

10 .nine hundred pounds of mineral wool which has been previously treated to coat it with hydrocarbonaceous material, and a binder.

In testimony, that I claim the foregoing as my own, I have hereto 'aflixed my slgnature in the presence of two Witnesses.

THOMAS B. PARKISON.

Witnesses WILLIAM OVERMIRE, LULA ADAMS. 

